Receiver for metal extrusion presses and the like with an inductive-heating arrangement



y 12, 1959 M. ARENZ ET AL RECEIVER FOR METAL EXTRUSION PRESSES AND THE LIKE WITH AN INDUCTIVE-HEATING ARRANGEMENT Filed Nov. 14, 1957 qg -q I/VVE/VTORS v M dz' e122 l b'evepe'zzy 6 United States Patent RECEIVER FOR METAL EXTRUSION PRESSES AND THE LIKE WITH AN lNDUCTIVE-HEAT- ING ARRANGEMENT Matthias Arenz, Dusseldorf-Lintorf, and Hans Vievering,

Duisburg-Huckingen, Germany, assignors to Schloemann Alrtiengesellschaft, Dusseldorf, Germany Application November 14, 1957, Serial No. 696,366

Claims priority, application Germany November 28, 1956 2 Claims. (Cl. 219-10.79)

This invention relates to a receiver on metal extrusion presses and the like comprising an inductive-heating arrangement in which the ends of concentric current conductors are alternately connected by means of bridges and in which terminals are provided, to connect with current cables, on one side of the receiver at the ends of two adjacent conductors.

The sockets of this type of receiver usually wear out much more quickly at the end facing the matrix than at the other end, therefore the desire occurs again and again of reversing the receiver after a certain period of operation so that the still little worn out socket side faces the matrix. The fulfilment of this desire however always fails because the current supply cables for the inductiveheating can no longer be connected to the receiver once it has been turned, as the two terminals face the matrix or matrix holder after turning and are therefore inaccessible. The idea already suggested of connecting the current cables on two adjacent bridges to the side free after turning cannot be put into eifect because two conductors would then remain currentless, which would result in uneven and therefore unacceptable heating of the receiver. The necessity has therefore been accepted of renewing the receiver sockets as soon as they are worn out on only one side.

The object of the invention is to avoid this disadvantage and to construct the inductive arrangement on the receivers in such a way that the receiver can be used without any waste worth speaking of. The invention consists in the provision of an uneven number of pairs of conductors and of terminals also on the ends of two conductors lying diagonally opposite one another on the other side of the receiver, to connect with the current of the current cables. These terminals are connected by a detachable bridge which, when the receiver is turned, is detached so that the current connection to the cables can be created by means of the terminals. The conductor ends hitherto connected to the cables and now facing the matrix are connected with one another by a detachable bridge.

When it is being manufactured the receiver is already provided with appropriate recesses to accommodate the terminals.

The invention will be more particularly described with reference to the accompanying drawings, wherein:

Figure 1 shows an axial section through a receiver ice having an inductive-heating arrangement according to the invention; and

Figures 2 and 3 are corresponding bottom and top plan views.

The receiver 1 has a socket 2. Concentric holes, in which conductors 4 are inserted, end in annular grooves 3 provided at both ends of the receiver. The ends of each two adjacent conductors are connected by bridges 5 to create the current path necessary for the inductive-heating. The connection of bridges 5 with conductors 4, which consist for example of copper rods or copper cables, is generally silvered, also the conductor 4 and bridges 5 themselves. Altogether seven pairs of conductors are provided in this example. On the upper side of the receiver there is a recess 6. A similar recess 7 lies diametrically opposed to it on the bottom. The recesses have a connection with the annular grooves 3, and jaws 8 are provided in the recesses to arrange cable terminals. The upper ends 4a (Figure 3) of two conductors can be connected either by a bridge (not shown) with each other, or by two bridges (not shown) with each of the neighbouring terminal jaws 8. Exactly the same arrangement is provided on the bottom side diagonally opposite. On the side of the receiver which is to face the matrix holder the ends 4a of the two adjacent conductors are con nected. On the opposite side of the receiver however they are each connected with the respective neighbouring terminal, jaw 8, so that the current cables can be connected to them. When one side of the socket 2 is worn out, the receiver is turned. In this it is only necessary to detach on the one side and arrange on the other the non-drawn bridges between the current ends 4a and to detach on the one side and arrange on the other the nondrawn bridges between the current ends 4a and the neighbouring terminal jaws. The receiver can be turned without difiiculty.

We claim:

1. A receiver on metal-extrusion presses and the like, with induction heating means comprising: a receiver body, electrical conductors extending through the receiver body parallel to its axis, bridges connecting the ends of adjacent conductors with one another at opposite ends of the receiver body in the manner requisite for induction heating, the receiver body being formed at each end with a recess on one side, each recess being so placed that the ends of two of the conductors extend into it, two terminals for the attachment of electric cables located in each of the recesses, and removable bridges in each recess for either connecting the two free conductor ends in that recess with one another or connecting each of them with one of the terminals in that recess.

2. A receiver as claimed in claim 1, the recesses at opposite ends of the receiver being at diametrically opposite positions.

References Cited in the file of this patent FOREIGN PATENTS 829,195 Germany Ian. 24, 1952 980,873 France May 18, 1951 1,100,738 France Sept. 23, 1955 

